Obamacare marketplaces are in trouble. What can be done?

BY REED ABELSON AND MARGOT SANGER-KATZ More at nytimes.com/upshotBUSINESS

It has been a hard couple of weeks for Obamacare. The law’s online marketplaces — where people were supposed to be able to easily shop for health insurance — have been suffering from highprofile defections and double-digit premium increases.
Critics...